Method of and machine for manufacturing fillers for shoes and boots



Aug.-13, 1929. M. GRUNE 1,724,473

METHOD OF AND MACHINE FOR MANUFACTURING FILLERS FOR SHOES hND BOOT S Filed Oct. 5. 1926 4 Sheets-Sheet' 1 Fig. 1.

In ventor':

M. GRUNE 1,724,473

METHOD OF AND MACHINE FOR MANUFACTURING FILLERS FOR SHOES AND BOOTS Aug. 13, 1929.

Filed Oct. 5. 1926 4 Sheets-Sheet 2 M. GRUNE ,473

"ETHOD OF AND MACHINE FOR MANUFACTURING FILLERS FOR SHOES AND BOOTS Aug. 13, 1929.

Filed Oct. 5/1926 4 Sheets-Sheet 5 Fig;

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Aug. 13, 1929. M. GRUNE uE'rnon OF AND mc'nms FOR mmuaqwunme mums you snoss AND BOOTS Filed Oct. 5, 1926 4 Sheets-Sheet 4 /f ////J m v 4 I/ llllll/l Ina/enter:

may @run-e 6 71 paste-board, have Patented Aug. 13, 1929.

UNITED STATES 1,724,413 PATENT "OFFICE.

MAX enema, or rriuvrnsmvs, GERMANY.

METHOD OF AND MACHINE FOR MANUFACTURING FILLERS FOR SHOES AND BOOTS.

Application filed October 5, 1926, Serial No. 139,741, and in Germany October 6, 1925.

boots with forms of another material than" wood. these forms being too expensive, and suited only in certain distinct cases, as for instance in connection with shoes and boots 7 exhibited in shop windows or the like, on account of which forms of a cheaper material, such as celluloid, glued fabric, or been used in the other or ordinary cases. It is also in these cases indispensably requisite to take care that the shape of the respective forms corresponds accurately to the shape of the last upon which the respective shoe or boot has been made, so that the shape of this latter is perfectly maintained when the form has been placed into it. i The present invention relates to forms of the last-mentioned kind, but the manufacture of forms answering the just-stated requirement as to the maintenance of the proper shape is connected with particular difliculties as the respective material which is preferably paste-board is subjected to different stresses or strains at difierent portions or parts of the last,- in consequence whereof a certain inclination to form folds arises and even rents are caused. Owing to these detrimental consequences it had proved impossible up to now to manufacture forms of the. kind in question in one piece and in one working phase; it proved necessary to make said forms in two parts and two working phases, these parts being then stitched together, glued, and pasted over, which rendered the manufacture expensive and the product inaccurate.

These and other drawbacks have been overcome by the present invention accord-. 'ing to which the lasts or form bodies are manufactured in a stamping machine working with specially designed stamping moulds and producing completely finished lasts from one piece of, paste-board in one phase.

A stamping machine designed according to this invention is shown diagrammatically and by way of example on the accompanying drawing, on which Fig. 1 is a front view and Fig. 6 is a longitudinal section through.

a stamping mould.

.Referring to Figs. 1 and 2, 2 denotes the frame of the machine, and a a pressing or stamping table which is vertically guided frame' The table a is being moved up and down by means of toggle-levers 3 the middle joint of which is connected with one end of connecting rod 4, the other end of which is connected with a crank 5. In the position of these members in Fig. 2. the table a is in its lowermost position.- When the crank 5 has made one half of a revolution, the lever arms are nearly in vertical position and the table a is in its highest po.-

sition.

The crank-shaft 5 is rotated from the shaft 6 by the intermediary of the wheelgearing shown in Fig. 2 in dotted lines (as are also the members? and 4:), and the shaft 6. is provided in known manner with a fast pulley and a loose pulley 7. There are provided means for stopping the machine and for re-starting' it in its upperbetween the two vert'ical standards of the takes place always'after a complete revolution the stopping takes place in the present case already after one half revolution of thelshaft 6, that is to say, the table a comes to a standstill in its lowermost position, as w'ell'as in its highest one. Re-starting after each stopping is effected by a foot lever 8. I

The bow-shaped upper partof the frame which is carried by the two vertical standards mentioned encloses in its uppermost or centre portion a spindle b from which is suspended a vertically adjustable guide member 0. The spindle b is provided with an external thread engaging an internal thread of a socket 9 having an upwardly extending pivot 10, the projecting portion of which is threaded and carries a counter nut 12 on this thread, and the end proper ofwhich forms a square 11 adapted to receive a wrench, by the application of which to said square the socket can be turned so as to lift or lower the guide member 0 according to the direction of rotation of said socket, whereafter the guide member is being fixed in its other position by the nut 12. The object of this adjustment is to regulate or vary the pressure existing between the stamping members when the table tr is in its uppermost position.

The guide member 0 carries two bell-crank levers d, the lower arms of which are subjected to the pressure of springs e constantly tending to hold said levers in the position Figs. 3 and 4. The guide member ccarries also centrally a vertically shiftable pivot f having an enlarged head located below the ends of the upper arms of said bell-crank levers. The pivot is normally maintained in its lowermost. position by the pressure of the springs e. The pivot f projects downwardly below the guide member 0 and holds an exchangeable pressing stamp g.

The table a carries the stamping mould which is shown in its entirety in Fig. 1 and besides, drawn to an enlarged scale, in Figs. 3-6; it consists of three main parts l1, '2', and 71:, of which h is provided with an upper cavity corresponding to the shape of the upper portion of the form to be made, so

that the finished form can be removed upwardly; the other two stamp members a and k serve to shape the lower portion of the form, one of them shapin the right half, the other the'left half thereo The stamp member 71. is located in a box at and the stamp members i and 7a are located in two lateral frames 12. and 0. The members It, 2' and is can be exchanged for similar members of. a more or less other configuration, as every other shape of form necessitates stamp parts of corresponding other shapes. But the exterior dimensions of all stamp parts, irrespective of their different shapes in detail, are the same so that one set of boxes or frames m, n, 0 will do for all stamp parts.

The lateral frames 11 and 0 are guided separately by guide members 32 and 9 attached to the box 122.; besides they are kept in contact with abutment members 3 (Figs. 4 and 5) by strong springs 9".

The mouding or shaping parts h, l: and i, as well as the stamp g may consist of any suitable material, preferably cast iron.

The manner of operation of the machine is as follows:

When the table a is in its lowermost position, as in Fig. 2 and the shaping mould is in the position Fig. 3. a piece a of pasteboard or another suitable materialaml having the suitable size andshape as requisite for the form to be made is placed upon the mould, as in Fig; 3, and the foot lever is depressed in order to start the machine, so

as to cause the shaft 6, the wheel-gearing, the crank-shaft 5 connecting rod 4 and the toggle lever 3 to lift the mould with said piece. The stamp g hereby enters the shaping mould and presses the piece If into it, as in Fig. 4. lVhen the bottom of the shaping mould h contacts with the lower end of the stamp 9 (it being understood that the piece t of paste-board or the like is between the mould bottom and the stamp), the mould lifts the stamp, as well as the pivot whereby the bell-crank levers d are turned from the position Fig. 4 into the position Fig. 5. In other words: the vertical arms of these levers shift the frames at and 0 and, by the intermediary of the boxes and also the mould parts is and i from the position Fig. 4: into the position Fig. 5, the springs 0 being now compressed and the lateral rims of the piece t being pressed against the opposite rims of the stamp 9 whereby the pressing and shap ing of the paste-board form is finished.

\Vhen this has been attained, the machine is stopped by means of thestopping mechanisnrwell known in connection with stamping or pressing machines and after a certain time it is re-started by again depressing the foot lever. The movements described. will now proceed in their reverse order. that is to say, the springs e withdraw the frames at and 0 with the mould parts i and Ir from the stamp g, and the box m with the mould part [L is withdrawn from the form made, that, finally, in turn, is withdrawn from the stamp g.

If forms of another size or shape are to be madenothing else is requisite than to exchange the stamp g and the mould parts it 6 7c.

1 wish it to be understood that although the shaping mould h, i, 70 shown in the drawing and described in this speciti at ion is composed of three members,- still, more than three members may form the mould in certain cases according to the more or less par- 11o ticular shape of the fillers to be made. There may, especially, be more than two lateral shaping mould members. such as i and is, there being then provided a suitably actuated bell-crank lever (like at) for every lateral mould member. But also concerning the means for moving the mould parts, in fact, the entire stamping press, may be 1nodified in many respects without departing from the gist of the invention. Only to give an example I mention that instead of the toggle-lever press a spindle press may be made use of, but this latter type is, in fact, to be preferred because of the stronger pressure that can be produced by it.

I claim:

1. The method of manufacturing forms for shoes and boots from paste-board, a fibrous substance or another material adapt-, ed to be stamped, consisting in cutting out 130 a piece of material into the suitable size and shape as requisite for the form to be made, forming first the upper tapered part of the form by a pressure exerted in one direction and then forming the lower part of the form by a pressure exerted on the material in a plurality of other directions.

2. The method of manufacturing forms for shoes and boots from paste-board, a fibrous substance or another material adapted-to be stamped consisting in cutting out a piece of material into the suitable size and shape as requisite for the form to be made, forming first the upper tapered part of the form by a pressure exerted in one direction and then forming the lower part of the form by a pressure exerted on the material 1n opposite directions and at 90 relatively to the first pressure.

3. A machine for the manufacture of forms for shoes and boots from paste-board, a fibrous substance or another material adapted to be stamped, comprising, in combination, a stamp having the shape of an.

inverted last, but being as much smaller as corresponds to the thickness of the material employed for making the form, a shaping mould corresponding to the lower portion of the form and additional shaping mould members corresponding to the upper lateral portion of said form, and means for moving said mould and said additional members against the said inverted last, said latter members being moved only after the said mould has come into contact with the material from which the form is to be made and has reached its nearest position with relation to the stamp.

4. A machine for the manufacture of forms for shoes and boots from paste-board, a fibrous substance or another material adapted to be stamped, comprising, in thorn; bination, a stamp having the shape of-an inverted last, but being as much smaller as corresponds to the thickness of the material employed for making the form,- an ex changeable shaping mould corresponding to the lower portion of this form, and exchangeable additional shaping mould members corresponding to the upper lateral portion of said form; members adapted to receive said mould and said additional mould parts, and

other exchangeable moulds and additional mould parts adapted to be employed in lieu of those first mentioned and having other inner shapes, but the same outer dimensions as the mould members mentioned in the first place; and means for moving every mould and the appertaining additional mould members against the said inverted last, said latter members being moved only after the said mould has come into contact with the 'material from which the form is-to be made and has reached its nearest position with relation to the stamp.

5. A machine for the manufacture of at right angles with respect to the first box and being held normally in a, position permitting the first mentioned mould to bemoved over the said inverted last, and means for thus moving the said mould parts, as

well as for moving the additional mould parts in such a manner that they are moved only after the said mouldhas come into contact with the material from which the form is to be made and has reached its nearest position with relation to the stamp.

6. A' machine for the manufacture of forms for shoes and boots from paste-board, a fibrous substance or another material adapted to be stamped, comprising, in combination a stamp having the shape of an in verted last, but being as much smaller as cor-' responds to the thickness of the material employed for making said form, an exchangeable shaping mould corresponding to the lower portion of the form, and exchangeable additional shaping mould members corresponding to the upper lateral portion of said form, boxes and frames adapted to receive said mould and'said additional mould parts, the latter frames being adapted to be moved at right angles with-respect to thefirst box and being held normally in a position permitting the first mentioned mould to be Iii mated over the said inverted last, means rat? moving the additional lateral mould parts towards one, another by the intermediary of the inverted last, and means for moving the main'mould part towards, against and together with said last so as to efiect thereby the movement of the lateral mould parts.

7. A machine for the manufacture of forms for shoes and boots from paste-board, a fibrous substance or another material adapted to be stamped, comprising, in combination, a stamp having the shape of an inverted last, a vertically adjustable member adapted to hold the last, in workingiposition, a shaping mould corresponding to the lower portion of the form and additional shaping mould members corresponding to the upper lateral portion ofsaid fornnand means for members being moved only after the said mould has come into contact with the material from which the form is to be made and has reached its nearest position with relation to the stamp.

8. A machine for the manufacture of forms for shoes and boots from paste-board, a fibrous substance or another material adapted to be stamped, comprising, in combination, a stamp having the shape of an inverted last, but being as much smaller as corresponds to the thickness of the material employed for making the form, a shaping mould corresponding to the lower portion of the I form and additional shaping mould members corresponding to the upper lateral portion of said form, a vertically movable table adapted to receive the complete'mould, toggle-levers so arranged as to be adapted to lift and lower said table, a, wheel gearing adapted to operate said toggle-levers, and means for stopping and restarting the machine when said table is in its uppermost and its lowermost position, substantially as set forth.

9. A method of manufacturing forms for shoes and boots which comprises cutting out the form into the size and shape required and from a suitable material, exerting a pressure in one direction on the material to form the upper part of the form, and then exerting a pressure on the material in another direction to form the lower part of the form.

10. A method of manufacturing forms for shoes and boots from materials which comprises exerting a pressure in one direction on the material to form the upper part of the form, and then exerting a. pressure on the material in another direction to form the lower part of the form.

11. A method of manufacturing forms for shoes and boots from materials which comprises exerting a pressure in one direction on the material to form one part of the form, and then exerting a pressure on the material in another direction to form the other part of the form.

In testimony whereof I affix my signature.

MAX GRUN E. 

